Valve-bag.



' No. 684,028. Patented Oct. 8, I90I.

- l. C. WUDWARD.

UNTTED STATES PATENT IRVING C. VVOODWARD, OF CHICAGO, ILLINOIS, ASSIGNOR TO ADELMER M.

BATES, OF SAME PLACE.

VA L VE-BAG.

STECIFICATION forming part of Letters Patent No. 684,028, dated October 8, 1901.

Application filed November 2, 1900. Serial No. 35,206. (No model.)

To all whom, t may concern:

Be it known that I, IRvINe C. WooDwARD, a citizen of the United States of America, and a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Valve-Bags, of which the following is a specification.

My invention relates to the class of bags, sacks, and other flexible receptacles known as Io valve bags, in which an internal flap serves as a closure for the mouth of the bag or sack.

The objects of my invention are to provide avalve or valves along the end of the bag, be-

tween the two sides thereof, such valve or valves being arranged so as to effectually serve to hold in the contents and to tend to prevent the outward bulging of the valve.

A further object is to accomplish these rezo sults with the use of the least possible material and the least possible extent of the seam length.

A further object is to accomplish these results by means of a bag blank or form of the usual size and shape.

My invention is illustrated in the accompanying drawings.

Figure 1 is an elevation of a bag constructed according to my invention turned 3o Wrong side out and showing the bag partly completed. Fig. 2 is a side elevation of the finished bag. Fig. 3 is a vertical section of same on the line 3 3 of Fig. 2. Fig. 4. isa top plan of the bag shown in Fig. 2.

The bag shown is formed of asheet of textile fabric, which is doubled upon itself at the crease 1 and has its edges 2 sewed together by the seam 5. When the seam 5 is made, the material of the bag is wrong side 4o out, as shown in Fig. 1. Vhile the material is in this position, the seams 6 7 and the seams 8 9 are sewed into same in the form shown in Fig. 1. The edges 10 of said material are now free from each other. This permits the bag to be turned right side out and to the position shown in Fig. 2. When the bag is turned to said position, it will be seen that the edges 11 are turned inwardly. The seams 7 and 9 are separated to form the 5o open passage 12 between the valve-aps 13, extending inwardly and terminating at the edges 11. The edges 10 are now sewed together by the seam 14. This forms a bag which is closed on all sides, except at the filling-apertures 12.

The operation of the device is as follows: The bag will be lled through the apertures 12. When same is filled to its full capacity, the material will press against one side of the iaps 13, and thus close said apertures 12. To securely close said apertures, the bag will be turned with the edge 10 toward the top. It will be seen that the bag will then rest evenly on the end at the seams 6 and the valveflaps 13.

It will be understood that the vertical seams 7 will be sufcient to connect the flaps 13 and cause same to act as a iiap in closing the bag. I prefer, however, to continue said seams 7 to form the seams 6. Itwill be seen that the seam 8 may also be omitted, leaving merely the vertical seams 7 and 9. These seams will serve to hold the aps 13 together and make an operative valve without the addition of the seams 6 and 8.

I have shown two apertures 12; but it is quite obvious that one alone may be used. In applying these bags to any ordinary form of filling-machine but one aperture would be used. If, however, nothing but the vertical seams or the seams parallel with the length of the bag are employed, there would have to be several of them, according to the size of the bag, and thus in such case there would bea series of-apertures. So, also, in the case of such a bag if it were desired to leave more than one aperture it might be done as indicated in the figures; but the whole principle of my invention is contained in a device where, with the horizontal as well as the vertical seams, there is but one valveopening at the end.

Other minor details in the structure shown may be altered without departing from the spirit` of my invent-ion. I therefore do not confine myself to such details, except-as hereinafter limited in the claims. I

What I claim as my invention, and desire yto secure by Letters Patent, is-

1. As a newarticle of manufacture, a valvebag having its side walls folded in at one end to form valve-flaps, with a series of fastenings along said end at the base of such flaps, separated from each other so as to forni a series of filling-apertures into the bag intermediate the corners of the bag and along the `loase of such flaps, and seams substantially parallel to the length of the bag and intersecting such fastenings, so as to form tubelike passages leading to such apertures.

2. As a new article of manufacture, a Valvebag having its side Walls folded in at one end to form valve-aps, with a series of short seams along said end at the base of such iiaps, separated from each other so as to form a series of filling-apertures into the bag intermediate the corners of the bag and along the base of such aps, and seams Substantially parallel to the length of the bag and intersecting the ends of such short seams, so as to Signed at Chicago this 31st day of October, 3o

IRVING C. WOODWARD.

Vitnesses:

WM. R. RUMMLER, GLEN C. STEPHENS. 

